3.3.4.2 Sending a DHCPv6 Information-request Message

A Validating Server MUST open UDP port 546 on the interfaces bound to the DHCPv6 server. If the Validating Server does not contain bound interfaces, it cannot validate itself.

A Validating Server MUST send a DHCPv6 Information-request message with the Rogue Detection Request Option (section 2.2.10.1) on all the interfaces bound to the DHCPv6 server.